Machine brake



IIVVEIVTOI? ovnck A. NOVICK.

MACHINE BRAKE.

APPLICATION FILED MAR. 16, 1920.

Patented Aug. 15, 1922.

2 SHEETSS'HEET l.

bma

TTONEY.

A. NOVICK.

MACHINE BRAKE.

APPLICATION FILED MAR- 16. 1920.

Patented Aug. 15, 1922.

2 SHEETS-SHEET 2- 7 IIVVLYVTOI? Abraham Novsck,

ABRAHAM NGVIGK, or new roan, N. Y., ASSIGNOR TO r. nsiv iriin MACHINE do. live, I

or NEW-YORK, N. Y., A conroRA'rroN or NEW YORK.

MACHINE BRAKE.

Specificationof Letters Patent; Patented 28 1 1922 Application filed March 16, 1920. SerialNo. 366,277

To all whom it may concern:

Be it known that I, .ABRAI-IA1\I Novio r, a citizen of the United States, and resident of the city of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Machine Brakes, of which the following is a specification This invention relates to braking mechanism, and especially to that type of such mechanism as is most advantageously applicable to envelope and similar machines. One of the objects'of this invention is the provision of a simple and efiective adjustable brake for stopping, a machine quickly by preventing the continuance of the motion of the machine due to inertia, after, the power has been cut off. I I r A further object of this invention is the, provision of means for automatically disengaging the machine clutch to cut of? the power from the machine whenever the brake is set, and for automatically releasing the brake whenever the clutch is thrown into engagement and the power thereby transmit ted to the machine. i y

A further object of this invention is the provision of means which make possible the release ot the brake by hand when the clutch is thrown out of engagement, at which time the automatic means operate to set the brake, said manually operated means being 1ar ranged to drop into inoperative position when the clutch is tl'llOWIllIlllO engagement.

To attain the above, and other objects, I employ themechanism shown in its preferred form in the accompanying drawings, in which, a v 1 Fig. 1 is a plan View old-my invention showing the mechanism in brake-releasing and clutch-engaging position. Fig-[ 2 is a front view of the same. Fig. 3 is a. treat view similar to Fig. 2, the parts being shown.

in the clutch-releasing and brakesetting position. Fig. 4 1s a vertical sect on on line ll of Fig. Fig; 5, is a plan view of the operating collar and of the .parts directly engaging the same, in the position corresponding to thatshown inFig, 3.

The frame 1 of the machine to which my improved mechanism is attached, suitably I supports the main shaft 2, which isdriven through a clutch controlledpulleyfrom a suitable source of power, said clutch, pulley, and source ot powennot being shown.

. Pulley 3,moui1tedon shaft 2 transmits-the power through belt 4 tothe vother parts of the machine, the'web 5 of said pulley being located at a suflicient distanceto one side of the middle of the rim of said pulley as to allow brake band 6 to engage the inner face 7 of said rim. One end of the annular brake band 6 is adapted to have pressure. put thereon as by means of pin 8 suitably-secured in brake lever 9,.while the other. end 01. said brake band merges with plate-like portion 10 and outstandingsupporting arm ll. The plate l0 of band 6 has :"an'open I slot out therein to allow-the same to be passed around the cylindrical part 120i guide 13. For supporting said guide,a stud l4, suitably fastened to .frame'l, isjprovided.

Flanges 1 5 and 16 are formed on opposite edges of cylinder 12 of guide 13,-and serve. to hold part of plate 10 of the brake'band between them to prevent side slippinggof a said band, cylinder 12 serving to prevent 1 outward radial movement of the, plate end of the band, With-respect to shaft 2. e

A lug l'z'pr'ojecting from flange 16. is threaded to movably hold adjustingscrew 18 therein, lock'nut 19 acting to secure-said screw in adjusted position} Along the'u pper edge of plate10, aipost'20ismounted,

said post being arranged for verticaladjustment on loosening set screw 21. For pivot loosely mounted therein, the t-hreaded -end vofisaid stud22 being securely screwedfinto lever 9 for allowing said'lever and'studto ,ally, supporting brake lever 9, outstanding rm. 11 of brake band 6 carries, stud- 22 rotate asa unit about thezaxis of said-{stud The lower part of lever 9 is bifurcatedto form; branches'23 andQt, while the upper I allow; The shape ofthe smaller end'of said lever is such that when-"said end" is near enough top stQQ, rotation of said I lever about pin 27 causes the small end of I said lever to tulcrum about the upper surface of post 20 to raise the end i25i o fbrake,

lever 9. Branch 23 of lever 9 has spring rod 29 passing therethrough, spring 30 positioned between the head 31 of said rod and the end of branch 23 acting to force head 31 against the lower end of adjusting screw 18 and acting also to rotate lever 9 to a position where pin 8 of said lever presses the free end of brake band 6 as far as it will go into closely pressed contact with surface 7 of pulley 3.

Prong 24 carries round headed bolt 32 thereon, bymeans of which, lever 9 may rotated against the action of spring 30 to withdraw pin 8 from the free end of the brake band, thereby releasing the pressure on said band. Said bolt 32 is operated by the rounded end of bifurcated control level 35, pivoted at 36 on supporting arm 37 of frame 1. For operating the clutch, not shown, and the brake mechanism simultaneously with one motion of the control lever, said lever has the ends as 3% thereof confined in groove 38 of slidable collar 39 on shaft 2, one side 40 of said collar being tapered. Said collar is so designed that the longitudinal movement in one direction necessary to disengage bolt 32 from lever 35, is sufiicient tojcause clutch fingers 41 to ride up on the cylindrical part of collar 39 (F 5) to disengage the clutch, and the longitudinal movement of said collar in the opposite direction necessary to engage the clutch by causing clutch fingers 41 to drop on to the conical part 40 of said'collar, is suflicient to cause the end 34 of lever 35 to engage bolt 52 to release the brake, as will be more fully described hereinafter.

The operation of my improved mechanism is as follows. It being assumed that the machine is in operation, the various parts are in the position shown in Fig. 1. If it is now desired to stop the machine, control lever 35 is moved so that end 34 moves away from,

pulley 3 and off the head of bolt 32. Collar 39 is thereby moved along shaft 2 away from pulley 3. Clutch fingers 11, which were in clutch engaging position, ride up from conicalpart 40 of the collar to the cylindrical part, disengaging the clutch. Resistance to spring 30 having been removed by the movement of lever 35, said spring tends to expand, forcing the branch 23 of brake lever 9 away from lug 17 and causing said brake lever to rotate together with stud 22 through a small angle in arm 11 of the brahe'band until pin 8 presses the free end of the brake band 6 tightly on to surface 7 of pulley 3 into the braking position. The positions that collar 39, lever 35, clutch fingers 41-1 and bolt c32 assume at this time are shown in Fig.

5. Similarly, when the clutch is engaged on the proper movement ofcontrol lever 35, the

brake is released, the pressure of pin 8 on the end of the brake band being relieved by the return movement of the parts, brake lever 9 being rotated in a direction opposite to that described above against the action of spring 30. In Fig. 2, the brake band (5 is shown completely disengaged from surface 7, but it will be understood that the distance between said band and the inner surface 7 of the pulley is exaggerated for clearness.

It is often necessary to cause the machine to which a clutch is attached to move a very small amount at a time, as when adjusting or repairing the machine, or when beginning a run. If, under these circumstances, the clutch is thrown into engagement, the ma chine is very likely to move too far before the clutch can be disengaged. A hand wheel is therefore usually provided to turn the machine, but, with the use of my improvedi mechanism, the clutch being disengaged and the brake being therefore set when the bane wheel is to be used, I have made provision for manually releasing the brake without throwing the clutch into engagement. The

parts being in the position shown in Fig. 8, y

if hand lever 26 is now raised to the position shown by the dotted lines of- Fig. 2, the small end thereof fulcrums against post 20, which has been previously adjusted to the proper height, and the end 25 of brake lever 9 is raised a suflicient distance to cause said brake lever to rotate somewhat to draw pin 8 away from the free end of brake band 6, relieving the pressure on said band sufficiently to re lease the brake.

The head of bolt 32 is moved somewhat, but not quite to the position it is forced toassume when it cont-acts with the end of control lever 35. It being desired now to apply the power again to the machine, control lever 35 is moved to throwthe clutch into engagement, the end 8% thereof thereby coming into contact with bolt 32, said bolt is moved an additional short distance sufiicient to rotate brake lever 9 to raise end 25 and hand lever 26 thereon and to disengage said lever from post 20, the weight of the large end of said hand lever 26 being suflicient to cause said lever to drop back to its normal position.

Adjustment of spring 30 is obtained by loosening lock nut 19 and by manipulating screw 18 until said spring exerts the de sired pressure on brake band 6, after which look nut 19 is again tightened.

hat I claim is 1. In a braking mechanism, a control lever, a slidable collar operated by said lever, means actuated by said collar for setting said mechanism, and means for operating said mechanism independently of said control lever, adapted to be set into brake releasing position and arranged to drop auto matically into its inoperative position on the manipulation of said control lever.

2. In a brake, a control lever, means operatively connected to said lever for setting tion.

said brake, and a hand lever pivoted near one end thereof and operatively connected to said brake, arranged to be set into position for'releasing said brake independently of said control lever and to automatically drop into its inoperative position on the manipulation of said control lever. 1

In a braking mechanism, means for manually releasing a brake comprising a brake lever, a hand lever pivoted near one endthereof carried by said brake lever, and an adjustable fulcrum arranged to be engaged by the small end of said hand lever on the manipulation of said hand lever when said brake lever is in the brake setting posi- 4. In a braking mechanism, a brake band fixed at one end thereof, and outstanding arm near the fixed endand integral with said band,.a brake lever pivoted on said arm, a pin on said brake lever forengaging the free end of said brake band, a spring arranged between saiddbra'ke lever and the fixed end of said brake band for urging said brake lever toward the brake setting position, and a control lever for partly rotating said brake lever for setting and for releasing said brake,

5. In a braking mechanism, an annular brake band terminating in a slotted platelike portion, means arranged in the slot of said band for fixedly holding, said platelike portion, an arm outstanding from the fixed portion of said band,'a spring pressed brake lever pivotally mountedon said arm, and a pin in said brake lever forengaging the free end of said'brake band.

6. In a braking mechanism, an annular brake band term n i111 plate-like Portion, means. for preventing radial outward movement of sald plate-like portion, an arm free end of said brake band, means for and for releasing saidbrake, 'a hand'lever pivoted near one end thereof carried by said brake lever, and an adjustable fulcrum ar-' ranged to be engagedby the small end-of said hand lever on the manipulation of said 1 hand le-verwhen said brake lever is in the brake setting position,vv

7. Ina braking'mechanism, a control lea brake band, abrake lever carried by said ver a slidable collar operated by said lever,

band, a pin on said brake lever for engaging with said brake lever, a s ring" urging-said brake lever pin into brake settingpositi on" and manually operable means forreleasing .the free end of said band whensaid control lever is moved out of operative engagement f 1 I a said brake band against the action of said" spring independently of-saidcontrollever.

Signed at the city of New York, in the county of New York and: State of New York, this 8th day'of March, A. D. 1920. Y H 1 v ABRAHAM NOVICIQT r I 

